script.js

import { utilsColor } from './utils/utilsColor.js';

var canvas = document.getElementById('myCanvas');
var ctx = canvas.getContext('2d');

var x = canvas.width/2;
var y = canvas.height - 30;

let speed = 2;

var dx = speed;
var dy = -speed;

var ballRadius = 25;
var paddleHeight = 10;
var paddleWidth = 100;
var paddleX = (canvas.width-paddleWidth)/2;
var rightPressed = false;
var leftPressed = false;
var brickRowCount = 5;
var brickColumnCount = 8;
var brickWidth = 100;
var brickHeight = 15;
var brickPadding = 7;
var brickOffsetTop = 30;
var brickOffsetLeft = 30;
var score = 0;
var lives = 3;
var modeColor = 'row';

let failure = document.querySelector('.failure');
let failureBtn = document.querySelector('#failureBtn');
let success = document.querySelector('.success');
let successBtn = document.querySelector('#successBtn');
let pauseBtn = document.getElementById('pauseBtn');

var isPaused = false;

function reloadPage() {
    document.location.reload();
}

function resetValues(element) {
    ballRadius = 0;
    lives = 0;
    score = 0;
    paddleWidth = 0;
    element.style.top = "40%";
}

//reloads page OnClick
failureBtn.addEventListener('click', () => {
    reloadPage();
});

successBtn.addEventListener('click', () => {
    reloadPage();
});

const speedSlider = document.querySelector("#speed-slider");

speedSlider.addEventListener("input", () => {
    speed = speedSlider.value;
    if (!isPaused) {
        dx = dx > 0 ? speed : -speed;
        dy = dy > 0 ? speed : -speed;
    }
})

const sizeSlider = document.querySelector("#size-slider");

sizeSlider.addEventListener("input", () => {
    ballRadius = sizeSlider.value;
})

changeBrickColumnCountAndOffsetLeft()
let bricks = [];
for (let c=0; c<brickColumnCount; c++) {
    bricks[c] = [];
    for (let r=0; r<brickRowCount; r++) {
        bricks[c][r] = {x: 0, y:0, status: 1, lives: getRandomArbitrary(1,5,true)};
    }
}

function changeBrickColumnCountAndOffsetLeft(){
    let lengthBriks = (brickColumnCount*(brickWidth+brickPadding))+brickOffsetLeft
    while (lengthBriks >= canvas.width) {
        brickColumnCount = brickColumnCount -1;
        lengthBriks = (brickColumnCount*(brickWidth+brickPadding))+brickOffsetLeft
    }
    brickOffsetLeft = ( (canvas.width - lengthBriks) + brickOffsetLeft ) / 2
}

function drawBricks() {
    for(let c=0; c<brickColumnCount; c++) {
        for(let r=0; r<brickRowCount; r++) {
            if(bricks[c][r].status == 1) {
                let brickX = (c*(brickWidth+brickPadding))+brickOffsetLeft;
                let brickY = (r*(brickHeight+brickPadding))+brickOffsetTop;
                bricks[c][r].x = brickX;
                bricks[c][r].y = brickY;
                ctx.beginPath();
                ctx.rect(brickX, brickY, brickWidth, brickHeight);
                ctx.fillStyle = utilsColor(c,r, modeColor);
                ctx.fill();

                // draw block lives
                ctx.font = `${brickHeight-2}px Arial`;
                ctx.fillStyle = "#FFFFFF";
                ctx.fillText(bricks[c][r].lives, brickX+(brickWidth/2), brickY+brickHeight-2);

                ctx.closePath();
            }
        }
    }
}

function drawBall() {
    ctx.beginPath();
    ctx.arc(x, y, ballRadius, 0, Math.PI*2);
    ctx.fillStyle = "#FFFF00";
    ctx.fill();
    ctx.closePath();
}

function drawPaddle() {
    ctx.beginPath();
    ctx.rect(paddleX, canvas.height-paddleHeight, paddleWidth, paddleHeight);
    ctx.fillStyle = "pink";
    ctx.fill();
    ctx.closePath();
}

function collisionDetection() {
    for(let c=0; c<brickColumnCount; c++){
        for(let r=0; r<brickRowCount; r++){
            let b = bricks[c][r];
            if(b.status  == 1) {
                let sideCollision =false
                if(x+ballRadius > b.x && x-ballRadius < b.x+brickWidth && y+ballRadius > b.y && y-ballRadius < b.y+brickHeight) {
                    if(y > b.y && y < b.y+brickHeight){
                        if(x < b.x || x > b.x+brickWidth){
                            dx = -dx;
                            sideCollision = true;
                        }
                    }

                    if(!sideCollision){
                        dy = -dy;
                    }

                    b.lives -= 1;
                    if(b.lives == 0){
                        b.status = 0;
                        score++;
                    }
                    if(score == brickRowCount*brickColumnCount) {
                        resetValues(success);
                    }
                    return
                }
            }
        }
    }
}

function drawScore () {
    ctx.font = "16px Arial";
    ctx.fillStyle = "white";
    ctx.fillText("Score: "+score, 8, 20);
}

function drawLives() {
    ctx.font = "16px Arial";
    ctx.fillStyle = "white";
    ctx.fillText("Lives: "+lives, canvas.width-65, 20);
}

function draw() {
    ctx.clearRect(0,0, canvas.width, canvas.height);
    drawBricks();
    drawBall();
    drawPaddle();
    drawScore();
    drawLives();

    if (!isPaused) {
        collisionDetection();

        if(y + dy < ballRadius) {
            dy = -dy;
        } else if (y + dy > canvas.height-ballRadius) {
            if(x > paddleX && x < paddleX + paddleWidth) {
                dy = -dy;
            } else {
                lives--;
                if(!lives) {
                    resetValues(failure);
                    return;
                } else {
                    x = canvas.width/2;
                    y = canvas.height-30;
                    dx = speed;
                    dy = -speed; 
                    paddleX = (canvas.width-paddleWidth)/2;
                }
            }
        }
        if(x + dx > canvas.width-ballRadius || x + dx < ballRadius) {
            dx = -dx;
            dy += getRandomArbitrary(-0.4, 0.4);
        }

        if(rightPressed && paddleX < canvas.width-paddleWidth) {
            paddleX += 7;
        }
        else if(leftPressed && paddleX > 0) {
            paddleX -= 7;
        }

        x += dx;
        y += dy;
    }

    requestAnimationFrame(draw);
}

document.addEventListener("mousemove", mouseMoveHandler);

// get a random value between two values
function getRandomArbitrary(min, max,toInt=false) {
    let value = Math.random() * (max - min) + min;
    if(toInt){
        return Math.round(value)
    }
    return value
}

function mouseMoveHandler(e) {
    if (!isPaused) {
        let relativeX = e.clientX - canvas.offsetLeft;
        if(relativeX > 0+paddleWidth/2 && relativeX < canvas.width-paddleWidth/2) {
            paddleX = relativeX - paddleWidth/2;
        }
    }
}

document.addEventListener("keydown", keyDownHandler);

function keyDownHandler(e) {
    // "D" or right arrow key for right and "A" or left arrow key for left movement 
    if(e.code == "KeyD" || e.code == "ArrowRight") {
        rightPressed = true;
    }
    
    if(e.code == "KeyA" || e.code == "ArrowLeft") {
        leftPressed = true;
    }

    // Add pause functionality on 'P' key press
    if(e.code == "KeyP") {
        togglePause();
    }
}

document.addEventListener("keyup", keyUpHandler);

function keyUpHandler(e) {
    if(e.code == "KeyD" || e.code == "ArrowRight") {
        rightPressed = false;
    }
    
    if(e.code == "KeyA" || e.code == "ArrowLeft") {
        leftPressed = false;
    }
}

// Function to toggle pause state
function togglePause() {
    isPaused = !isPaused;
    if (isPaused) {
        pauseBtn.textContent = "Resume";
    } else {
        pauseBtn.textContent = "Pause";
    }
}

pauseBtn.addEventListener("click", togglePause);;

draw();